I agree that Chad probably needs a 2 psi RPV up front and that he should check the rear shoe adjustment again.. If the replacement master cylinder does not have an integral RPV for the rear brakes, which it probably doesn't, then A 10 lb RPV would be correct for rear drums.
Also, if the new master cylinder has a proportioning valve, then it has to have the brake warning switch removed and a dummy plug installed in the proportioning valve to keep the valve from moving during brake bleeding. The plug is generally sold separately, which is always annoying.
Honestly though, I would first look at the master to see if it was bench bled properly prior to being installed.... The nice thing about these trucks is that you can use a jack to level the master, so you don't need to remove it if you need to bleed it again.
